One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6,10,13)(7,14,12,9)(8,16,18,11)(15,19,17,20)(21,22,27,32)(23,33,34,29)(24,36,35,28)(25,31,26,30)(5,7,9,6,10,12,14,13)(8,17,19,16,18,15,20,11)(21,23,26,24,27,34,25,35)(22,28,31,29,32,36,30,33)(5,8,10,18)(6,11,13,16)(7,15,12,17)(9,19,14,20)(21,24,26,34,27,35,25,23)(22,29,31,36,32,33,30,28)(2,4)(8,18)(11,16)(15,17)(19,20)(23,34)(24,35)(28,36)(29,33) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.